Add doc getter for Property

This allows to access the doc attribute from Properties
when set:
    >>> p = Property(int, doc="some doc")
    >>> p.__doc__
    some doc
    >>> p = Property(int)
    >>> p.__doc__
    None

Fixes: PYSIDE-135
Change-Id: Idf3e6c6632c775a50cfc8ecf03de3d2dc485f9f4
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
Reviewed-by: Christian Tismer <tismer@stackless.com>

1 files changed, 27 insertions, 0 deletions

diff --git a/sources/pyside2/libpyside/pysideproperty.cpp b/sources/pyside2/libpyside/pysideproperty.cpp
index 74a77e6c3..bdabf1202 100644
--- a/sources/pyside2/libpyside/pysideproperty.cpp
+++ b/sources/pyside2/libpyside/pysideproperty.cpp
@@ -61,6 +61,9 @@ static PyObject *qPropertyGetter(PyObject *, PyObject *);
 static int qpropertyTraverse(PyObject *self, visitproc visit, void *arg);
 static int qpropertyClear(PyObject *self);
 
+// Attributes
+static PyObject *qPropertyDocGet(PyObject *, void *);
+
 static PyMethodDef PySidePropertyMethods[] = {
     {"setter", (PyCFunction)qPropertySetter, METH_O, 0},
     {"write", (PyCFunction)qPropertySetter, METH_O, 0},
@@ -69,6 +72,11 @@ static PyMethodDef PySidePropertyMethods[] = {
     {0, 0, 0, 0}
 };
 
+static PyGetSetDef PySidePropertyType_getset[] = {
+    {"__doc__", qPropertyDocGet, nullptr, nullptr, nullptr},
+    {nullptr, nullptr, nullptr, nullptr, nullptr}
+};
+
 static PyType_Slot PySidePropertyType_slots[] = {
     {Py_tp_dealloc, (void *)qpropertyDeAlloc},
     {Py_tp_call, (void *)qPropertyCall},
@@ -77,6 +85,7 @@ static PyType_Slot PySidePropertyType_slots[] = {
     {Py_tp_methods, (void *)PySidePropertyMethods},
     {Py_tp_init, (void *)qpropertyTpInit},
     {Py_tp_new, (void *)qpropertyTpNew},
+    {Py_tp_getset, PySidePropertyType_getset},
     {0, 0}
 };
 // Dotted modulename is crucial for PyType_FromSpec to work. Is this name right?
@@ -265,6 +274,24 @@ PyObject *qPropertyGetter(PyObject *self, PyObject *callback)
     return nullptr;
 }
 
+static PyObject *qPropertyDocGet(PyObject *self, void *)
+{
+    auto data = reinterpret_cast<PySideProperty *>(self);
+    PySidePropertyPrivate *pData = data->d;
+
+    QByteArray doc(pData->doc);
+    if (!doc.isEmpty()) {
+#if PY_MAJOR_VERSION >= 3
+        return PyUnicode_FromString(doc);
+#else
+        return PyString_FromString(doc);
+#endif
+    }
+    Py_INCREF(Py_None);
+    return Py_None;
+}
+
+
 static int qpropertyTraverse(PyObject *self, visitproc visit, void *arg)
 {
     PySidePropertyPrivate *data = reinterpret_cast<PySideProperty *>(self)->d;